I have been taking junel fe for about a year and a half now but never have allowed my boyfriend to ejaculate inside of me still due to fear of pregnancy. Last night he acadently did. I am on a new set of pills for this month and got off of my sugar pills Saturday, he wants to buy plan B because he is scared. Is it worth it and if so will it mess up my birth control or anything like that?

Please answer as soon as possible